为了从廉价的无机铝盐制备高性能的氧化铝前驱物,用表面活性剂调控形貌制得了异形薄水铝石.采用XRD和SEM等表征手段,研究了十二烷基磺酸钠、十二烷基苯磺酸钠、十六烷基三甲基溴化铵、酒石酸钠和聚乙二醇2000共4种表面活性剂对硫酸铝和尿素水热合成薄水铝石晶体结构和形貌的影响,并对其晶体结构和形貌变化的形成机制进行了初步分析.研究表明:表面活性剂均不改变产物的晶型,但可对产物的形貌和粒径进行一定程度的调控,尤其是160℃下加入酒石酸钠时产物的结晶度明显降低,其粒子由数个微米的针状团簇体转变为0.5～3 μm的圆饼状粒子;硫酸铝和尿素水热合成薄水铝石时加入适量酒石酸钠可以实现产物形貌的有效调控.
参考文献
| [1] | KROKIDIS X;RAYBAUD P;GOBICHON A et al.Theoretical study of the dehydration process of boehmite to γ-alumina[J].Journal of Physical Chemistry B,2001,105(22):5121-5130. |
| [2] | Christopher E.Bunker;Barbara A.Harruff;Pankaj Pathak;Andrew Payzant;Lawrence F.Allard;Ya-Ping Sun .Formation of Cadmium Sulfide Nanoparticles in Reverse Micelles:Extreme Sensitivity to Preparation Procedure[J].Langmuir: The ACS Journal of Surfaces and Colloids,2004(13):5642-5644. |
| [3] | 蔡卫权,李会泉,张懿.Al3+浓度对水热法合成低密度薄水铝石性质的影响[J].功能材料,2004(06):779-781,784. |
| [4] | 蔡卫权,李会泉,张懿.低密度薄水铝石晶体的水热生长过程[J].物理化学学报,2004(07):717-721. |
| [5] | 杭州大学化学系分析化学教研室.分析化学手册.第二分册:化学分析[M].北京:化学工业出版社,2001 |
| [6] | S. Music;D. Dragcevic;S. Popovic .Hydrothermal crystallization of boehmite from freshly precipitated aluminium hydroxide[J].Materials Letters,1999(6):269-274. |
| [7] | SARIKAYA Y;ADA K;ALEMDAROGLU T et al.The effect of Al3+ concentration on the properties of alumina powders obtained by reaction between aluminium sulphate and urea in boiling aqueous solution[J].Journal of the European Ceramic Society,2002,22(12):1905-1910. |
| [8] | RAMANATHAN S;ROY S K;BHAT R et al.Alumina powders from aluminium nitrate-urea and aluminium sulphate-urea reactions-the role of the precursor anion and process conditions on characteristics[J].Ceramics International,1997,23(01):45-53. |
| [9] | Ramanathan S;Roy S K;Bhat R et al.Preparation and characterisation of boehmite precursor and sinterable alumina powder from aqueous aluminium chloride-urea reaction[J].Journal of Alloys and Compounds,1996,243(1-2):39-44. |
| [10] | 张克从.近代晶体生长基础(下册)[M].北京:科学出版社,1987 |
| [11] | KEATING C D;KOVALESKI K M;NATAN M J .Protein:colloid conjugates for surface enhanced raman scattering:stability and control of protein orientation[J].Journal of Physical Chemistry B,1998,102(47):9404-9408. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%